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The effects of pre-sowing irrigation and phosphorus application on water use and grain yield of spring wheat were examined in a dry year on the semi-arid Loess Plateau of China. The study included four treatments: (1) with 30mm pre-sowing irrigation but without application of phosphorus (W); (2) with phosphorus application but without pre-sowing irrigation (P); (3) pre-sowing irrigation (30mm) plus...
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